نتایج جستجو برای: elasticity coefficient

تعداد نتایج: 192886  

2010
Thomas Blesgen Anja Schlömerkemper

For the validity of the weak maximum principle for classical solutions of elliptic partial differential equations it is sufficient that the coefficient matrix a(x) is non-negative. In this note we consider maximum principles for weak solutions of elliptic partial differential equations in divergence form with bounded coefficients a . We demonstrate that the assumption that the coefficient matri...

2014
Carla Cruz M. I. Falcão H. R. Malonek

The use of a non-commutative algebra in hypercomplex function theory requires a large variety of different representations of polynomials suitably adapted to the solution of different concrete problems. Naturally arises the question of their relationships and the advantages or disadvantages of different types of polynomials. In this sense, the present paper investigates the intrinsic relationsh...

2001
Robert K. Plice Kenneth L. Kraemer

The payoffs from investments in information technology are investigated at the international level by analyzing a database containing six years of output, employment and investment data for six industry sectors in 36 countries. The Solow endogenousgrowth model is employed to derive parameters of a Cobb-Douglas production function relating aggregate GDP to levels of three inputs: IT capital, non...

2003
Wayne Howard

Milk production supply response at the regional level for the U.S. dairy sector is estimated through the use of dynamic dual models. Adjustment rates and elasticity measures are presented, and then the estimated parameter coefficients are used to stimulate shifts in production resulting from price changes. A drop in milk price designed to realign market conditions is projected to be borne large...

2016
Serge Nicaise

A Mindlin-Timoshenko model with non constant and non smooth coefficients set in a bounded domain of R, d ≥ 1 with some internal dissipations is proposed. It corresponds to the coupling between the wave equation and the dynamical elastic system. If the dissipation acts on both equations, we show an exponential decay rate. On the contrary if the dissipation is only active on the elasticity equati...

Journal: :The Journal of experimental biology 2010
J R A Taylor S N Patek

Resisting impact and avoiding injury are central to survival in situations ranging from the abiotic forces of crashing waves to biotic collisions with aggressive conspecifics. Although impacts and collisions in biology are ubiquitous, most studies focus on the material properties of biological structures under static loading. Here, we examine the mechanical impact properties of the mantis shrim...

EFTEKHARI-YEKTA B., , MARGHUSSIAN V.K., ,

The effect of precipitation of ?.qss. and gahnite phases during heat treatment of glass frits in the ZnO-Al2O3-SiO2 system on the mechanical property of resulting glass-ceramic specimens were investigated. It was shown that gahnite glass-ceramics had higher bend strength and toughness values than ?.qss. ones. The results are attributed to the higher modulus of elasticity as well as higher therm...

Javad Jafari Fesharaki, Sa’id Golabi Seyed Ghasem Madani

This research develops thermo-elastic analysis of a functionally graded cylinder under thermo-mechanical loadings. Heat conduction equation in cylindrical coordinate system is solved. Thermal conductivity coefficient is graded along the radial direction. By considering a symmetric distribution of temperature, loading and boundary conditions, strain-displacement and stress-strain relations can b...

Journal: :Marmara Medical Journal 2021

Objective: Stiffness of breast lesions helps distinguish malignant from benign solid masses. can be quantitatively measured by magnetic resonance and ultrasound imaging using apparent diffusion coefficient (ADC) shear-wave elastography (SWE) techniques, respectively. This study aims to analyze correlations between SWE ADC in biopsy-proven small fibroadenomas. Patients Methods: Shear-wave measur...

2007
Yury Grabovsky Graeme W. Milton Daniel S. Sage

Typically, the elastic and electrical properties of composite materials are strongly microstructure dependent. So it comes as a nice surprise to come across exact formulae for effective moduli that are universally valid no matter what the microstructure. Such exact formulae provide useful benchmarks for testing numerical and actual experimental data, and for evaluating the merit of various appr...

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